
Study shows T. rex numbered 2.5 billion
ReutersIt was among the largest carnivorous dinosaurs, possessing a skull about 5 feet (1.5 meters) long, massive and muscular jaws with a bite force capable of crushing bone

Science
The story of 220-million-year-old rat-like creatures via microfossils
Aswathi Pacha The teeth were studied and compared with previously reported cynodonts